CN114414428B - Experimental method for evaluating influence of invasion liquid on shale oil momentum - Google Patents
Experimental method for evaluating influence of invasion liquid on shale oil momentum Download PDFInfo
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Abstract
The invention discloses an experimental method for evaluating the influence of invasion liquid on shale oil momentum, which comprises the following steps of S1, core pretreatment: s2, preparing a slurry solution and adding manganese chloride; performing a wet filtration experiment on the rock core by using a slurry solution; testing the nuclear magnetic T2 spectrum of the core after the wet filtration experiment and calculating the spectral area A Oil L Saturation S Oil L Volume V Oil L Pore liquid saturation S Liquid L And volume of invaded liquid V Liquid L (ii) a S3, reducing saturation for many times by adopting a throughput mode on the rock core; the nuclear magnetic T2 spectrum was tested to calculate the spectral area A after each reduction in the matrix pore saturation Ci Saturation S of the remaining oil in the pores Oil i Oil recovery RF Oil i Volume V of the residual invasion solution in the pores Liquid Ci And saturation S Liquid i (ii) a S4, drawing the core at CO 2 Oil phase recovery RF during huff and puff Oil i And saturation S of invaded liquid Liquid i A plate; the plate can be used for analyzing the intrusion liquid to CO 2 And (4) influence rules of the oil displacement process.
Description
Technical Field
The invention relates to the technical field of exploration and development, in particular to an experimental method for evaluating the influence of invasion liquid on shale oil momentum.
Background
Shale oil available reserve (simply called "momentum") evaluation technology usually only calculates the influence of the lost oil quantity caused by the influence of temperature or pressure on the total momentum, and the influence of external invasion fluid on the momentum is ignored in the prior art. During the drilling of oil fields, the mud filtrate under pressure invades the matrix pores of the rock and forms invaded zones with a certain depth. The evaluation of the momentum of the shale formation requires the corresponding laboratory analysis to be performed on the well core sample, and under the influence of invasion, part of the oil in the pores of the core sample can be replaced by the invaded fluid. The presence of the invasion fluid may affect the accuracy of formation mobility evaluation.
CO 2 Is a common displacement medium in site, CO 2 The throughput technology is a common oil displacement technology, and the amount of drivable oil under the action of the technology is the key point of shale oil mobility research. CO2 2 After the core is injected, the oil in the pores and the external invasion liquid can interact with each other, and the invasion liquid can block CO 2 The oil in the pores is contacted, so that the recovery ratio obtained in a laboratory is reduced, and when the mobility of the formation crude oil is evaluated by using recovery ratio data in the laboratory, the mobility of the formation crude oil is underestimated by an experimental result, so that the resource loss is caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an experimental method for evaluating the influence of invasion liquid on the momentum of shale oil.
The technical scheme adopted by the invention is as follows:
an experimental method for evaluating the influence of invasion liquid on the momentum of shale oil comprises the following steps,
s1, core pretreatment:
s11, drying the core, weighing and obtaining the dry weight m of the core d ；
S12, performing a saturated oil experiment on the dried rock core, and recording the density of oil as rho Oil Weighing the core in saturated oil state s Calculating the volume V of oil in the pores based on the density and weight of the oil Oil S (ii) a Testing nuclear magnetism T2 spectrum of the rock core under the saturated oil state and calculating the spectral area A s (ii) a Calculating a proportionality coefficient C of the spectrum area and the oil volume in the pore space according to the spectrum area and the oil volume in the pore space;
s2, slurry wetting test of the core:
s21, preparing a slurry solution, adding manganese chloride, filtering part of the slurry solution to obtain a slurry filtrate, and measuring the density rho of the slurry filtrate Liquid for treating urinary tract infection ；
S22, performing a moisture filtration experiment on the rock core by adopting the slurry solution prepared in the step S21 to simulate an invasion state;
s23 weighing mass m of core after wet filtration experiment L Testing nuclear magnetism T2 spectrum of the core after the wet filtration experiment and calculating the spectral area A Oil L And calculating the saturation S of the residual oil in the rock core Oil L And volume V Oil L (ii) a Wherein S is Oil L ＝A Oil L /A s *100％；V Oil L ＝A Oil L /C＝A Oil L /{A S /[(m s -m d )/ρ Oil ]}；
S24, calculating the pore liquid-containing saturation S of the rock core after the wet filtration experiment Liquid L And volume of invaded liquid V Liquid L (ii) a Wherein the pore contains a liquid saturation S Liquid L ＝100％-S Oil L ＝100％-A Oil L /A s 100% volume of invading liquid V Liquid L ＝[(m L -m d )-V Oil L *ρ Oil(s) ]/ρ Liquid for treating urinary tract infection ；
S3 CO of core 2 Throughput experiment:
s31, loading the core into a core holder, and reducing the porosity saturation of the matrix in a 'huff and puff' mode for the core;
s32, repeating the step S31 for multiple times, and weighing the mass m of the core after reducing the porosity of the matrix each time Ci Test Nuclear magnetic T2 Spectrum calculation spectral area A Ci ；
S33, calculating the saturation S of the residual oil in the pores of the core in the handling experiment process Oil i And oil recovery RF Oil i (ii) a Wherein S is Oil i ＝A Ci /A s *100％；RF Oil i ＝100％-S Oil i ；
S34, calculating volume V of residual invasion liquid in core pores in the throughout experiment process Liquid Ci And saturation S Liquid i (ii) a Wherein, V Oil Ci ＝A Ci /C；V Liquid Ci ＝[(m Ci -m d )-(V Oil Ci *ρ Oil(s) )]/ρ Liquid for treating urinary tract infection ；S Solution i ＝V Liquid Ci /(V Oil Ci +V Liquid Ci )*100％；
S4, drawing the core at CO 2 Oil phase recovery RF during huff and puff Oil i And saturation S of the invader solution Solution i Plate, core obtained in CO 2 Oil phase recovery rate change curve and saturation curve of invasion liquid in the huff and puff process.
Further, the volume V of oil in the pores Oil S Calculated using the following formula: v Oil S ＝(m s -m d )/ρ Oil 。
Further, the proportionality coefficient C is calculated by using the following formula: a. the s ＝C*V Oil S ＝C*[(m s -m d )/ρ Oil ]If C is equal to A s /[(m s -m d )/ρ Oil ]。
Further, the step S31 specifically includes the following three stages:
swallowing: opening a gas inlet end valve of the core holder and closing a gas outlet end valve of the core holder, and injecting a determined amount of carbon dioxide into the core;
stewing: closing a gas inlet end valve of the core holder, sealing carbon dioxide in the core, enabling gas to diffuse into the pores of the core, and maintaining for about 12-24 hours;
spit: opening the gas valve at the front end of the core to release CO 2 ，CO 2 The molecules will carry water and oil out of the core pores.
Further, drying the rock core, specifically, placing the rock core in an oven to be dried, wherein the drying temperature is 200 ℃, and the drying time is 24 hours.
Further, performing a saturated oil experiment on the dried rock core, specifically, putting the rock core into a sample chamber of a saturation tank, and injecting oil into a liquid chamber of the saturation tank; then simultaneously vacuumizing the sample chamber and the liquid chamber to remove air in the sample chamber and the liquid chamber; and then, injecting oil in the fluid chamber into the sample chamber to immerse the core, pressurizing to 32MPa, and keeping for 24 hours to saturate the sample with oil.
Further, the step S22 is specifically to load a saturated oil core into a holder of a slurry circulation device, and apply confining pressure to wrap the core to perform a wet filtration experiment; the tail end of the core holder is closed, the front end of the core holder is connected with a slurry circulating pipeline, and slurry solution flows through the front end face of the core from top to bottom, so that a part of slurry filtrate is diffused and invaded into the pores of the core, and oil in the slurry filtrate is replaced to form a state of invading fluid.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 shows the core in CO 2 Oil phase recovery RF during huff and puff Oil i And saturation S of the invader solution Liquid i And (7) making a plate.
Detailed Description
The embodiments of the present invention will be described in detail with reference to specific embodiments. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The application provides an experimental method for evaluating the influence of invasion liquid on shale oil momentum, which comprises the following steps of S1 and core pretreatment:
s11, drying the core, weighing and obtaining the dry weight m of the core d In units of g; specifically, the rock core is placed in an oven to be dried, wherein the drying temperature is 200 ℃, and the drying time is 24 hours.
And S13, performing a saturated oil experiment on the dried core. Firstly, putting a rock core into a sample chamber of a saturation tank, and injecting oil into a liquid chamber of the saturation tank; then simultaneously vacuumizing the sample chamber and the liquid chamber to remove air in the sample chamber and the liquid chamber; and then, injecting oil in the fluid chamber into the sample chamber to immerse the core, pressurizing to 32MPa, and keeping for 24 hours to saturate the sample with oil.
The density of the oil is denoted as ρ Oil Unit g/cm 3 Weighing the saturated weight m of the core in saturated oil state s Calculating the volume V of oil in the pores based on the density and weight of the oil Oil S (ii) a Wherein V Oil S ＝(m s -m d )/ρ Oil(s) 。
Testing nuclear magnetism T2 spectrum of the rock core under the saturated oil state and calculating the spectral area A s At this time, the pore oil saturation S Oil s ＝100％，A s Reflecting the state of fully saturated oil in the pores.
Nuclear magnetic T2 spectrum area and oil V in pore space Oil S The volume of (A) is in direct proportion, and the proportion coefficient of the two is marked as C; and calculating a proportionality coefficient C of the spectrum area and the oil volume in the pore according to the spectrum area and the oil volume in the pore.
The proportionality coefficient C is calculated using the following formula: a. the s ＝C*V Oil S ＝C*[(m s -m d )/ρ Oil ]If C is equal to A s /[(m s -m d )/ρ Oil ]。
S2, slurry wetting test of the core:
s21, preparing a slurry solution, adding manganese chloride, filtering a part of the slurry solution to obtain a slurry filtrate, and measuring the density rho of the slurry filtrate Liquid for treating urinary tract infection 。
The material for preparing the slurry solution is a commercial product, and the slurry solution is obtained after water is added according to the specification. Manganese chloride with the concentration of 20g/L is added into the prepared slurry solution so as to shield nuclear magnetic signals of water in the slurry solution.
As the slurry particles can not enter the core pores in the process of flushing the core by using the slurry solution, only the slurry filtrate can enter the rock pores, the slurry particles can be accumulated on the end surface of the flushed core to form a mud cake, and the invasion liquid is the slurry filtrate, so that the density of the slurry filtrate is measured. Specifically, a part of slurry solution is taken for filtration treatment, and the density rho of slurry filtrate is measured Liquid for treating urinary tract infection 。
And S22, performing a moisture filtration experiment on the core by using the slurry solution prepared in the step S21 to simulate an invasion state.
Specifically, a saturated oil core is loaded into a holder of slurry circulation equipment, and confining pressure is applied to wrap the core to carry out a moisture filtration experiment; the tail end of the core holder is closed, the front end of the core holder is connected with a slurry circulating pipeline, and slurry solution flows through the front end face of the core from top to bottom; in the process that the front end slurry solution scours the end face of the rock core, part of slurry filtrate can diffuse and invade into the pores of the rock core and replace oil in the pores, and particles in the slurry can be accumulated at the front end of the rock core to form a mud cake; the wet filtration test was completed after 24 hours of flushing, at which time some of the oil in the core was replaced by the invaded mud filtrate, and the oil saturation was less than 100%, thus creating a state in which invaded fluid was present.
S23 weighing mass m of core after wet filtration experiment L Testing nuclear magnetism T2 spectrum of the core after the wet filtration experiment and calculating the spectral area A L And calculating the saturation S of the residual oil in the rock core Oil L And volume V Oil L 。
Taking out the sample after the wet filtration experiment is finished, washing away mud cakes by using manganese chloride solution with the concentration of 20g/L, wiping fluid on the surface of the rock core by using filter paper, and weighing the mass weight m of the rock core L (ii) a Nuclear magnetic T2 spectrum calculation spectral area a of test core Oil L At the moment, the nuclear magnetic spectrum area reflects the saturation S of the residual oil in the rock core Oil L ，S Oil L ＝A Oil L /A s *100％。
The volume V of oil remaining in the pores was calculated using the following formula Oil L ：V Oil L ＝A Oil L /C＝A Oil L /{A S /[(m s -m d )/ρ Oil ]}。
S24, calculating the pore liquid saturation S of the core SHALE-1 after the wet filtration experiment Liquid L And volume of invading liquid V Liquid L (ii) a Wherein the pore contains a liquid saturation S Liquid L ＝100％-S Oil L ＝100％-A Oil L /A s 100% volume of invading liquid V Liquid L ＝[(m L -m d )-V Oil L *ρ Oil ]/ρ Liquid for treating urinary tract infection 。
The difference in area between the NMR T2 spectra before and after wet filtration represents the amount of the invaded liquid in the pores, and the saturation of the invaded liquid is denoted as S Liquid L (ii) a Filter elementBefore the wet experiment begins, the saturation degree of the invasion liquid in the pores is 0; after the wet filtration experiment is finished, the total saturation of the intrusion liquid and the oil in the pores is 100 percent, so S Liquid L ＝100％-S Oil L ＝100％-A Oil L /A s *100％。
The total mass of the fluids in the core pores after the wet filtration test is the sum of two fluids, namely original oil and invasion liquid, so m L -m d ＝V Oil L *ρ Oil(s) +V Liquid L *ρ Liquid for treating urinary tract infection (ii) a This gives: v Liquid L ＝[(m L -m d )-V Oil L *ρ Oil(s) ]/ρ Liquid for treating urinary tract infection 。
S3 CO of core 2 Throughput experiment:
s31, placing the core processed in the S23 mode into a core holder, and reducing the porosity saturation of the matrix in a handling mode on the core, wherein the handling mode specifically comprises the following three stages;
swallowing: and opening a gas inlet end valve of the core holder and closing a gas outlet end valve of the core holder, and injecting a determined amount of carbon dioxide into the core.
Stewing: and closing a gas inlet end valve of the core holder, and sealing carbon dioxide in the core to ensure that gas is diffused into the pores of the core and is maintained for about 12-24 hours.
Spit: opening the gas valve at the front end of the core to release CO 2 ，CO 2 The molecules will carry water and oil out of the core pores.
S32, repeating the steps S313-6 times, and weighing the mass m after each time Ci The spectrum area A is calculated by testing the nuclear magnetic T2 spectrum Ci . The saturation of the oil and the invaded fluid continues to drop during the process, with a total saturation of less than 100%, thus requiring the calculation of both saturations by the volume of oil remaining in the pores and the residual invaded fluid.
S33, calculating the saturation S of the residual oil in the pores of the core in the handling experiment process Oil i And oil recovery RF Oil i 。
S Oil i ＝A Ci /A s *100％＝V Oil Ci /(V Oil Ci +V Liquid Ci )*100％；
RF Oil i ＝100％-S Oil i ；
S34, calculating the volume V of the residual invasion liquid in the pore space of the rock core in the handling experiment process Liquid Ci And saturation S Liquid for treating urinary tract infection i。
S Liquid i ＝V Liquid Ci /(V Oil Ci +V Liquid Ci )*100％；
Wherein the content of the first and second substances,
V oil Ci ＝A Ci /C；
V Liquid Ci ＝[(m Ci -m d )-(V Oil Ci *ρ Oil )]/ρ Liquid for medical purpose 。
S4, drawing the core at CO 2 Oil phase recovery RF during huff and puff Oil i And saturation S of the invader solution Liquid i Plate, core obtained in CO 2 An oil phase recovery ratio change curve and an invasion liquid saturation curve in the huff and puff process; the trend of oil recovery in the plate can be used to analyze the CO content of the invasion liquid 2 The influence rule of the oil displacement process can help to adjust development parameters to improve the dynamic consumption of resources. The plotted plate is shown in fig. 1.
In FIG. 1, the abscissa is the throughput run, where "CO" is 2 Throughput round 0 "represents the initial state, which in this application represents the state at the end of the core wetting experiment. "CO 2 Throughput runs 1-4 "represent 4 runs of CO2 throughput processes, respectively. Principal axis of ordinate being saturation S of the entering liquid Liquid i The change of the saturation of the invading liquid corresponds to a descending process; oil recovery RF with core as secondary axis of ordinate Oil i Which corresponds to the cumulative amount of oil produced at each stage, is an increasing process.
As can be seen from FIG. 1, CO 2 When the 1 st round and the 2 nd round of the huff and puff experiment are carried out, the oil recovery rate is slowly increased due to the fact that the rock core contains the invasion liquid; as the invasion liquid is gradually produced, at the end of the 2 nd round, the saturation of the invasion liquid is 0, which represents that the invasion liquid is completely produced, and after that, the recovery rate of oil is greatly improved; by 3 and 4 rounds, the recovery factor values were essentially stable, and the oil recovery factor at 4 rounds was representative of the CO 2 Throughput experiments can yield the maximum amount of movement.
The method adopts an experimental mode to simulate the invasion process of the invasion liquid, the recovery rate data and the invasion liquid saturation data of the oil in the recovery process are calculated quantitatively, and the chart is drawn according to the data, so that the change trend of the recovery rate of the oil in the rock core containing the invasion liquid and the change trend of the invasion liquid saturation can be reflected visually, and the method can be used for analyzing the CO saturation change of the invasion liquid 2 The influence rule of the oil displacement process can help to adjust development parameters to improve the dynamic consumption of resources.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixedly connected and detachably connected, or integrally formed; may be an electrical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, system, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, systems, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (5)
1. An experimental method for evaluating the influence of an invasion liquid on the momentum of shale oil is characterized by comprising the following steps,
s1, core pretreatment:
s11, drying the core, weighing and obtaining the dry weight m of the core d ；
S12, performing a saturated oil experiment on the dried rock core, and recording the density of oil as rho Oil Weighing the core in saturated oil state s Calculating the volume V of oil in the pores based on the density and weight of the oil Oil S (ii) a Testing nuclear magnetism T2 spectrum of the rock core under the saturated oil state and calculating the spectral area A s (ii) a Calculating a proportionality coefficient C of the spectrum area and the oil volume in the pore space according to the spectrum area and the oil volume in the pore space;
s2, and carrying out a slurry wet-filtering experiment on the core:
s21, preparing a slurry solution, adding manganese chloride, filtering a part of the slurry solution to obtain a slurry filtrate, and measuring the density rho of the slurry filtrate Liquid for treating urinary tract infection ；
S22, performing a moisture filtration experiment on the rock core by adopting the slurry solution prepared in the step S21 to simulate an invasion state;
s23 weighing mass m of core after wet filtration experiment L Testing nuclear magnetism T2 spectrum of the core after the wet filtration experiment and calculating the spectral area A Oil L And calculating the saturation S of the residual oil in the rock core Oil L And volume V Oil L (ii) a Wherein S is Oil L ＝A Oil L /A s *100％；V Oil L ＝A Oil L /C＝A Oil L /{A S /[(m s -m d )/ρ Oil ]}；
S24, calculating the pore liquid-containing saturation S of the rock core after the wet filtration experiment Liquid L And volume of invaded liquid V Liquid L (ii) a Wherein the pore contains a liquid saturation S Liquid L ＝100％-S Oil L ＝100％-A Oil L /A s 100% volume of invading liquid V Liquid L ＝[(m L -m d )-V Oil L *ρ Oil ]/ρ Liquid for medical purpose ；
S3 CO of core 2 Throughput experiment:
s31, loading the core into a core holder, and reducing the matrix pore saturation degree by adopting a handling mode for the core;
s32, repeating the step S31 for multiple times, and weighing the mass m of the core after reducing the porosity of the matrix each time Ci The spectrum area A is calculated by testing the nuclear magnetic T2 spectrum Ci ；
S33, calculating the saturation S of the residual oil in the pore space of the core in the handling experiment process Oil i And oil recovery RF Oil i (ii) a Wherein S is Oil i ＝A Ci /A s *100％；RF Oil i ＝100％-S Oil i ；
S34, calculating the volume V of the residual invasion liquid in the pore space of the rock core in the handling experiment process Liquid Ci And saturation S Liquid i (ii) a Wherein, V Oil Ci ＝A Ci /C；V Liquid Ci ＝[(m Ci -m d )-(V Oil Ci *ρ Oil )]/ρ Liquid for medical purpose ；S Liquid i ＝V Liquid Ci /(V Oil Ci +V Liquid Ci )*100％；
S4, drawing the core at CO 2 Oil phase recovery RF during huff and puff Oil i And saturation S of invaded liquid Liquid i Plate, core obtained in CO 2 Oil phase recovery rate change curve and saturation curve of invasion liquid in the huff and puff process.
2. The experimental method for evaluating the influence of invasion fluid on shale oil momentum as claimed in claim 1, wherein the step S31 specifically comprises the following three stages:
swallowing: opening a gas inlet end valve of the core holder and closing a gas outlet end valve of the core holder, and injecting a determined amount of carbon dioxide into the core;
stewing: closing a gas inlet end valve of the core holder, sealing carbon dioxide in the core, enabling gas to diffuse into the pores of the core, and maintaining for 12-24 hours;
spit: opening the gas valve at the front end of the core to release CO 2 ，CO 2 The molecules will carry water and oil out of the core pores.
3. The experimental method for evaluating the influence of the invasion liquid on the shale oil momentum as claimed in claim 1, wherein the core is dried by placing the core in an oven for drying at 200 ℃ for 24 hours.
4. The experimental method for evaluating the influence of the invaded liquid on the shale oil momentum as claimed in claim 1, wherein the dried core is subjected to a saturated oil experiment, specifically, the core is put into a sample chamber of a saturation tank, and oil is injected into a liquid chamber of the saturation tank; then simultaneously vacuumizing the sample chamber and the liquid chamber to remove air in the sample chamber and the liquid chamber; and then, injecting oil in the liquid chamber into the sample chamber to immerse the core, pressurizing to 32MPa, and keeping for 24 hours to saturate the sample with oil.
5. The experimental method for evaluating the influence of the invaded liquid on the shale oil momentum as claimed in claim 1, wherein the step S22 is specifically that a saturated oil core is loaded into a holder of a mud circulation device, and confining pressure is applied to wrap the core to carry out a wet filtration experiment; the tail end of the core holder is closed, the front end of the core holder is connected with a slurry circulating pipeline, and slurry solution flows through the front end face of the core from top to bottom, so that a part of slurry filtrate is diffused and invaded into the pores of the core, and oil in the slurry filtrate is replaced to form a state of invading fluid.
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| CN111287708B (en) * | 2019-11-28 | 2021-06-11 | 中国石油大学(华东) | Reservoir transformation device and method for improving hydrate reservoir recovery ratio |
| CN111948109A (en) * | 2020-07-07 | 2020-11-17 | 重庆科技学院 | Experimental method for simulating 'soaking' operation in shale gas exploitation process |
| CN111912957B (en) * | 2020-08-24 | 2021-06-01 | 东北石油大学 | Shale oil quantity detection method and system based on occurrence state |
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